Population density (sq mi)6975791
Median age36.538.037.7
Male/Female ratio1.0:11.0:11.0:1
Married (15yrs & older)70%60%55%
Families w/ Kids under 1836%44%43%
Speak English93%92%79%
Speak Spanish7%4%13%

Key findings

  • The population density in Alton is 1123% higher than Iowa
  • The median age in Alton is 4% lower than Iowa
  • In Alton 91.40% of the population is White
  • In Alton 0.68% of the population is Black
  • In Alton 0.45% of the population is Asian

Compare Alton, IA Demographics


      Alton population breakdown by race

      American Indian0.00%0.32%0.82%
      Native Hawaiian0.00%0.08%0.18%
      Mixed race1.51%1.97%3.06%
      Other race5.96%1.27%4.75%
      In Alton, 9.4% of people are of Hispanic or Latino origin.
      Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

      Household income distribution

      Place of birth by citizenship

      Alton age breakdown

      Marital status

      Age of children in married couples

      Source: The Alton, IA demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).